When a ball is thrown upward then due to earth's gravitational pull it come back to ground, hence nothing touches ball and it comes back to you.
Every mass in the universe creates its own gravitational field.
Any other mass placed in the original mass’s gravitational field will feel an attractive gravitational force directed towards the center of the original mass. The same is true for the earth, a planet with a very large mass compared to the ball with a small mass. The ball always feels an attractive force towards the center of the earth (which we see as directed towards the ground). When it is thrown up, the gravitational force pulls it back down.
You must observe that when the ball is thrown up, it keeps moving up for some time, but constantly keeps getting slower until it stops and begins falling back down, getting faster and faster. This is because the force of earth’s gravitational field is always directed downwards (towards the center of the earth.
The acceleration due to earth’s gravity, “g” has a value of 9.81 m/s^2.
When the ball is thrown up, it is going against the earth’s gravitational field and so, the earth’s gravitational force pulls it back down, accelerating it downwards.